Periodic Testing; Checking The Extent Of Servicing - Samson 3349 Mounting And Operating Instructions

NOTICE
!
Risk of the process medium being contami-
nated through the use of unsuitable lubri-
cants and/or contaminated tools and com-
ponents.
Î Keep the valve and the tools used free
from solvents and grease.
Î Make sure that only suitable lubricants
are used.
Note
The control valve was checked by SAMSON
before delivery.
− Certain test results certified by SAMSON
lose their validity when the valve is
opened. Such testing includes seat leakage
and leak tests.
− The product warranty becomes void if ser-
vice or repair work not described in these
instructions is performed without prior
agreement by SAMSON's After-sales Ser-
vice.
− Only use original spare parts by SAM-
SON, which comply with the original spec-
ifications.

9.1 Periodic testing

Depending on the operating conditions,
check the valve at certain intervals to prevent
possible failure before it can occur. Plant op-
erators are responsible for drawing up an
inspection and test plan.
EB 8048-2 EN
Tip
Our after-sales service can support you in
drawing up an inspection and test plan for
your plant.
9.2 Checking the extent of
servicing
Î Check wear at seat and plug. Replace
the damaged plug (see section 9.5.2 or
9.6.2).
Î Check the diaphragm for damage (e.g.
cracks, milky coloring at the bends). Re-
place the damaged diaphragm (see sec-
tion 9.5.2 or 9.6.2).
Î If the valve leaks even if the diaphragm
is intact, check the tightening torque of
the joint between plug and plug stem as
well as body and bonnet/flange.
Servicing
9-3